This is a prop and nothing more. There is no gimmick, you can search online and find your own tiny plunger(the author has seen one for sale as a wine stopper). If they hadn’t stopped selling the gimmicked version of the plunger along with this trick, then Tiny Plunger wouldn’t be listed here because the gimmicked version is a bit of a fooler even when you know it’s gimmicked. How’s that for ironic?